Sony MHC-V73D Service Manual page 39

2020/06/19 02:21:42 (GMT+09:00)
MHC-V73D
• Note for Printed Wiring Boards and Schematic Diagrams
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• : parts extracted from the conductor side.
• : Pattern from the side which enables seeing.
(The other layer's patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Component Side) parts face are indicated.
• MOTHERBOARD board is multi-layer printed board. However,
the patterns of intermediate layers have not been included in
diagrams.
• Indication of transistor.
C
Q These are omitted.
B E
D
Q These are omitted.
G S
Q
B C E
These are omitted.
Q
B C E
These are omitted.
Note 1: When the MS-476 board is defective, exchange the
entire LOADING COMPLETE ASSY (T).
Note 2: When the SENSOR board is defective, exchange the
TOP PANEL ASSY SERVICE (V73D).
Note 3: When the MOTHERBOARD mounted pc board is
replaced, be sure to refer to "DESTINATION SETTING
METHOD" on page 6.
39
Note on Schematic Diagram:
• All capacitors are in μF unless otherwise noted. (p: pF) 50 V or
less are not indicated except for electrolytics and tantalums.
• All resistors are in  and 1 / W or less unless otherwise specifi ed.
4
• : Internal component.
f
• 2 : Nonfl ammable resistor.
• 5 : Fusible resistor.
• C : Panel designation.
Note: The components identifi ed by mark 0 or dotted line with
mark 0 are critical for safety.
Replace only with part number specifi ed.
• A : B+ Line.
• B : B– Line.
• H : Adjustment for repair.
• Voltages and waveforms are dc with respect to ground under
no-signal (detuned) conditions.
no mark : TUNER
( ) : CD PLAY
{ } : DVD PLAY
[ ] : USB
< > : Bluetooth
: Impossible to measure
*
• Voltages are taken with VOM (Input impedance 10 M).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
: AUDIO
F
f : TUNER (FM)
L : CD PLAY
: VIDEO
E
d : USB
J : AUDIO DIGITAL
: MIC
N
• Circuit Boards Location
VFD board
SENSOR board
POWER-KEY board
IR board
SMPS board
EXTENSION board
PARTY LED-LR board
MS-476 board
HORN LED board
SW LED-L board
PARTY RGB-FR board
Sony CONFIDENTIAL
For Authorized Servicer
NFC board
MIC-USB board
DAB board
(AEP)
MOTHERBOARD board
LED HUB board
PARTY RGB-BK board
PARTY LED-LR board
SW LED-R board
MHC-V73D
SYS SET